Radiosignaling



Oct. 31, 1933.

A. W. SLAGHT RADIOS IGNALING Filed April 27, 1931 nnmmnnn H 9 mm WM %LMA r TOR/YE) Patented Oct. 31, 1933 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates particularly to radio sensitive receivingsystems.

It is one object of the invention to provide a simple and compact meansthat will eliminate the necessity of providing the usual aerial or loopantennae that ordinarily forms a part or a radio receiving set.

It is also an object of the invention to provide a means of thecharacter indicated that will secure increased volume in the receivingset, and that will also greatly increase the selectivity of the set andgreatly increase its efiiciency in tuning in distant sending stations,as well as function as a filter to cut down interference, are lightnoises, A. C. hum etc.

In the drawing:

Figure 1 is a schematic diagram showing the preferred embodiment of myinvention as applied to any form of tube receiving set.

Figure 2 is an elevation of a cell or unit embodying my invention,partly in section and part broken away.

Referring now more particularly to the embodiment of the inventionherein shown and described, I show at 1 a receiving set of any desiredtype or form, several tubes being indicated at 2 to show the generalcharacter of the set. The usual aerial and ground terminals of the setare shown at 3 and 4 respectively.

The radiant energy collector unit forming the subject matter of thepresent invention comprises a wire coil 5 of a suitable number of turns,one end of the coil being connected to a connector 6 connected to anoutside ground as '7, and the other end being connected to a connector 8which is passed axially through the coil as at 9 and connected to theground terminal of the set 4. Another coil 10 is wound upon the coil 5and has substantially the same number of turns as coil 40 5, one end ofthe coil being connected to a connector as 11 connected to the aerialterminal of the set 3 and the other end terminating at a point as 12adjacent the end of coil 5 where it is connected to connector 8.

In its commercial form this unit is mounted in a case 13 and imbedded ina suitable insulating material such as parafiine wax indicated at 14.

I have found that by means of a hook-up of this kind the necessity ofproviding either an 5 outside or an inside aerial is entirelyeliminated, and that notonly is the selectivity of the set greatlyincreased but its efiiciency is greatly augmented along the line ofnoise reduction, etc., the results obtained being superior to thoseobtained by the device disclosed in my prior patent bearing No.1,782,831, and dated November 25, 1930.

One feature of this device is that there is no metallic connectionbetween the two coils 5 and 10 so that no closed circuit is provided forthe passage of an electric current such as produced by lightning.

It is to be understood, of course, that while I have herein shown anddescribed but one specific embodiment of the invention, changes 30 inform, construction, and method of assembling and mode of operation maybe made within the scope of the appended claim.

I claim:

In a radio receiver, a radiant energy collector 35 unit comprising apair of fixed coupled coils, one of said coils having one of its endsdirectly connected to an outside ground and its opposite end connectedto a connector extending axially through the coil and connected to theground terminal of the receiver, the other coil having one unconnectedend and one end connected to a connector connected to the aerialterminal of the receiver.

ACE W. SLAGHT.

